Recoil-operated firearm



May 1, 1923. y1,453,439

` N. CEDILLO RECO IL CPERATED FIREARM Filed March 21'. 19121 e sheets-sheetA l E7/ventan- N. CEDILLO RECOL OPERATED FIREARM May l, 11.9.23.

1921 e sheets-sheet 2 Filed March 23A..

Inventor.' Mmm Ced ille) j@ May 1, 1923. 1,453,439

N. cEDlLLo v REGO IL OPERATED FIREARM Filed March 21. 1921 6 Sheets-Sheet 4 I@ 2 6 ab n @Wa .s6 .5 5'

l Pa '7 4 9 J'cmgo Cedillo,

Atty

N.I CEDILLO RECO IL OPERATED FIREARM May 1, 1923.

Filed March 21 1921 6 Sheets-Sheet 5 dillo, M

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iED s'rTEs NICASIO'CEDILLO, OF HOUSTON, TEXAS, ASSIGNOR TO C. E. REED, OFv HOUSTON, TEXAS.

ENT, OFFICE.

RECOILPERATED mamma.

Application'led March 21, 1921. Serial No. 454,002.

To all whom t may concern: Be' it known that I, NICAsIo CEDILLO, a citizenv of Mexico, and a resident of Houston, Harris County, Texas, have vinvented certain new and useful Improvements in Recoil-Operated Firearms, of which the following is a specification.

My present invention relates to improvements in-machine'guns and aims to greatly reduce the number of parts and to provide a much more simple form of construction capable of being more economically' manufactured and one which will be more durable and elcient in use.

With these andother objects in view the invention includes the novel feature lof construction and .arrangement and combination of p'arts hereinafter described, the nature and scope of my said invention being particularly defined by the appended clalms.

An embodiment of my invention is illustrated in the accompanying drawings in which:

Figure 1 is a longitudinal sectional view through the complete gun except the stock which is shown partly in elevation, thisview showing the partsv in the position assumed 'after pulling the trigger but before recoil.

Fig. 2 is an enlarged side elevation of the main portion of the gun.

Fig. 3 is an enlarged sectional view, taken longitudinally of t e gun, with the parts positioned ready for firing by pulling the trigger.

Fig. 4 is a similar view, but showing the parts positioned as at the instant of ring.

Fig. 5 is a similar view, with the breechbolt retracted under the action of the recoil, and showing the ejector throwing the old shell out.

Fig. 6 is a similar view, with the parts fully-retracted and ready to move forward and carry a fresh cartridge into the breech.

Fig. 7l is a similar view, illustrating the action of the magazine escapement, when one compartment has been emptied.

Fig. 8 is anenlarged front elevation of the n.

Flg. 9 is a transverse section through the I' 12-12 0f Fig. 3.

Fig. 13 is a perspective view of the hammer.

Fig. 14 is a side elevation showing in detail the barrel-carrier. y

Figs. 15, 16 and 17 are details of the breech action slide, and Fig. 18 is Aan enlarged plan view of the breech bolt alone.

Fig. 19 is a detail view.

Referring by reference characters to these4 drawings, the numeral 1 designates the barrel, which is rifled in the usual or any desired manner, and which is firmly fitted into a reinforcing and carrying mantle orl sleeve 2, and held therein by a dowel pin l".

The sleeve 2 is'preferably enlarged at its rear end and of cylindrical shape and provided with a plurality of annular grooves, as indicated at 2a. l

This enlarged cylindrical end is slidingly held in the cylindrical barrel receiving extension 3a of the casing member 3 which contains orcarries the working parts of the gun. Casing member 3a is provided with numerous air passages 3* to allow passage of air-tothe annular ooves for cooling purposes. The barrel 1s normally pressed outward` in the firing direction to the limit of its Amovement by a helical spring 4 lying between the barrel receiving extension 3a and the reduced end of the barrel sleeve, said ism l Sliably mounted within the barrel carer is a breech member or breech block 6 ad a breech bolt 7 which have longitudinal bs on their side -faces which slidingly enige corresponding guide grooves v1n the lner faces of the walls of the barrel carrier.

he breech member is cut away1 to receive le hammer mechanism, hereinafter de :ribed into which cut away portions the ps of the breech bolt 7 and firing pin 8 roject, the firing pin being slidably lounted in the central longitudinal bore or assage of the breech bolt. I

A dependin projection 6a from the upper ortion of t e. breech member extends irough an elongated opening or slot 7 in le' wall of the breech bolt and also engages u elongated recess 8a of a different length l the firing pin (constituting a lost motion innection) so that backward movement of le' breech member will carry with it the reech bolt and firing pin upon the projecon encountering the rear ends of the s ots r recesses inA said parts.

Carried in a recess in the upper side of le breech bolt and projecting beyond the 1d thereof` is an extractor 9 having its forard endshaped or hooked indicated at 10 r engage the rim of the cartridge.

On its under side the breech bolt is simiarly recessed or grooved to receive the lector 11 which is mounted in said groove i/asto have a sliding movement therein mited by a projection 7" on the breech olt engaging a recess 11a in the ejector, le forward end of the ejector normally caring against the heel of the cartridge.

The ejector is provided in its under face 'ith an elongated recessed portion 11b hich` terminates at its forward end in a loulder 11 designed to cooperate with a iop device which comprises a pin 12 seated i a vertical recess in the transverse wall of the barrel receiver beneath the breech olt and normally forced Y upward by a Jring 12a.' The upper end of the stop pin aars with a sliding contact on the under de ofthe breech bolt and ejector, and in 1e backward movement of these parts, aters the recess or groove 11b and travels lerein until it contacts with the shoulder 11c which causes the ejector to be held stationary while the breech bolt and extractor continue their rearward movement, resultiilg in the ejection of the empty cartridge s ell.

Y Fresh cartridges are supplied from a cartridge container 13 which is in the form of a rectangular box open at its upperside and divided by partitions 13a into a plurali-ty of cartridge containing compartments of a width permittin the cartridges to lie therein in staggered 're ation as shown. This cartridge container is mounted to slide transversely in an o en frame member 33 which forms prefera ly an integral part of the casing 3. The container is properly guided in the frame and prevented from binding therein by guide ribs 13b on its sides which engage corresponding grooves in the sides of the frame, and by the bottom rib 13 which engages a similar groove in the bottom of the frame.

Rib 13e is provided in its under side with a recess c of slightly more than semi-cylindrical form in cross-section within which is located a spring`14 which abuts atone end against and is secured to a stop c carried by the container and at the other end against a, circular projection c2 on the frame. The spring 14 tends, when unrestrained, to move the cartridge container to the right, Fig. 10, so as to bring the cartridge containing compartments successively into loading position as soon as a preceding compartment has been emptied, the said container being nor mally held stationary by a spring dog 15 seated in a recess in the transverse wall of the frame or casing and having its locking end v15a adapted to engage a series of recesses 13 in the rear wall of the container. The upper edges of the division walls 13l of the container are provided withvo'verhangingledges which serve to retain the cartridges in position in the compartments due to the staggered relation hereinbefore referred to. 1

Located in eachV compartment beneath the cartridges therein, is a follower 16 which is pressed upwardly by a spring 17, preferably of zigzag leaf form as shown, which effects delivery of the cartridges from the compartment when in loading position, said follower having an elevated portion 16a .at one side which tends to crowd the'lowermost cartridge towards or. position it in proximity to the opposite wall of the compartment. Each follower has a longitudinal bore or passage within which is located a pin or transmitter 18 which normally and A when any cartridges are in the compartment, lies with' its ends in sliding contact with the walls of the container, but which, when the last cartridge has' been ejected. comes into line at its front end with the `flange and at its rear end with the locking projection a of the dog or detent- 15, having a spring shank. Thereupon the backward movement of the barrel or recoil thereof forces the transmitter backward and by its pressure removes the locking projection 15a from engagement with the correhammer 19 mounted to oscillat/e on pivot pin 19a and having a projection 19b which engages by a pin and slot connectionwith a pojection 20a carried by the main spring rod 20. The hammer has a reduced or web like portion 19d, and the breech bolt, lips or pro jection 7d, which overlap said web when the breech bolt is in locked position,

The main spring rod passes through an opening in the rear wall of the breech block and has a shoulder 20b cooperating with the front wall thereof, while the portion of the main spring rod which projects through the rearwall of the breech block is encircled by main spring 2OX which is secured in a recess in the stock and bears against the rear wall of the breech block. The main sprmg rod has a longitudinal bore 20c extending backward from its front end, within which bore is'slidingly itteda rod 5e fast at its front end to the transverse wall 5d of the barrel receiver. ncircling this rod between saidwall 5d and the main Spring rod is a helical compression spring 5f, and the forward end of the main spring rod is preferably provided with a countersink or annular rebate to make provision for a longer spring than could otherwise be secured, this spring serving to actuate the hammer to s fire the cartridge.

receiver in firing, or the hand action slidev l21, effects the cooking of the hammer due to Backard movement imparted to the breech block, either under the impact of the barrel the action of the -shoulder 6b of the breech block and the rear end of the breech bolt on lock 23 which is in/ the shape of a rotary pin having a flat side 23c designed to be pressed upon by spring 23", this pin engagmg a curved recess 19c in the outer surface of the hammer, this lock being automatically unlocked on forward movement of the breech block by a projection 6e on the latter engaging a projection 23a on the locking pin.

The breech block may be locked in its retracted position by rotary locking pin 24 cooperating with locking recess 6t of the breech block, the said pin 24 being operated by hand, by the trigger end or handle 24a.

The trigger is acted upon by spring 25 and is actuated by trigger ward 27 connected thereto by bar 27a.

The usual stock is indicated at 28, and the gun in practice would beprovided with customary connection.

It is believed that from the foregoing'the construction and operation of my improved front and rear sights-and tripod gun will be clear, it being of course, understood that the gun will continue to re automatically as long as the linger is held pressed' upon the trigger ward, but will stop instantly Ijirpon such release as is customary.

aving thus described my invention, what I claim is:

1. A machine gun comprising a casing,vv

a barrel carrier carried thereby to be movable under recoil, a breech bolt slidably carried by said barrel carrier and having a'v the upper part of said breech bolt, an ejector carried by the lower part to have limited sliding movement, said ejector having an elongatedjr'ecess in its under surface terminating in an abrupt -shoulder at its forward end, and a projectable contact device carried by the barrel carrier for coaction with said shoulder.

3. A machine gun comprising a casing, a barrel carrier carried thereby to be movable under recoil; a breech bolt slidably carried by said-barrel carrier and having a central firing pin, an extractor carried by the upper part of said breech bolt, an ejector carried by'the lower part to have limited sliding movement, said Aejector having an elongated recess in its under.l face terminating in an abrupt shoulder, a slidable pin seated in a recess in the barrel carrier d adapted to enter said recess and coopate with said shoulder, and a spring in 'Ld recess acting on said pin.

4:. In a machine, a main casing', a barrel rrier movable therein under recoil, a barrigidlyconnected to said barrel carrier, )reech block and breech'bolt supportedby id barrel carrier, said breech bolt having central assa e, a firing pin therein, said eech bo t an firing pin having 'aligning )ngated slots or recesses, and said breech )ck having a part projecting into both id slots or recesses.

5. In a machine gun, a main casing, a rrel carrier slidably guided therein, a eech bolt slidably guided in said carrier d carrying a firing pin, a breech. block dably `carried in said casing, said breech ck-having a lost motion connection with th said breech bolt and irin pin and havg also a shoulder adjacent t e rear end of a breech bolt and ahammerv having face rtions overlying said shoulder and the ir end of the breech block. v 6. In a machine gun, a main casing, a rrel carrier slidably guided therein, a eech bolt slidably guided in said carrier d carrying -a firing pin,;a breech blockv dably carried in said casing, said breech )ck having a llost motion connection with th said breech bolt and firing pin and hav-,-

g also a shoulder offset in rearof the rear d of the breech bolt, and a hammer hav-- fesses, said breech block having a shoulder 'set in rear of the rear-end of the breech lt, and a hammer having a stepped face )peratingwith said shoulder and breech lt end, 3. In a machine gun, a: main casing, a rrel carrier slidably guided in said casg, a breech bolt and firingpin slidably ided by said carrier, a breech block havg a lost motion connection with said breech lt and firing pin, a hammer pivotally card by said barrel carrier and having a part t coacting with 'said .breech bolt and firg pin, and a spring acting onsaid ham- =r.

9. In a machine n, a mainv casing, a rrel carrier ,slida ly .guided therein, a aech bolt and firing pin slidably mounted said carrier, a breech block also slidably with said slidab e mounted in said carrier, a-.main spring exerting forward pressure on said breech block,.a hammer articulated to said carrier, an arm or projection depending from the hammer, a slidable member having a part connected to said hammer arm, a sprin exerting rearward pressure on said sli able' member,.and trigger mechanism cooperating with said slidable member.

10. ln a machine gun, a main casing, a' barrel carrier slidablyguided therein, a

breech bolt and firing pin slidably mounted erting rearward pressure 011 vsaid sli' able' member, and tri er mechanism cooperating member. 1,1 In a machine barrel carrier slidab y guided therein, a breech bolt and firing pin slidably mounted in said carrier, a breech block also slidably mounted in said carrier, a hammer articun, a main casing, a Y

'lated to said carrier, a slidable rod guided in the casing and extending through an opening in the breech block, the forward end. of said rod having an actuating connection with said' hammer, a spring interposed between the front end of said rod and a part of the barrel carrier, a trigger mechanism cooperating with a part carried by said rod, and a spring exerting forward pressure op said breech block.

12. In a machine gun, a main casing, a barrel -carrier slidably guided therein, a breech bolt and firing pin slidably mounted in said carrier, a breech block also slidablyV mounted in said carrier, a hammer articulated to said carrier, a slidable rod guided in the casing and extendlng through an .opening in the breech block, the forward end of said rod having an actuating connection with said hammer, a spring interposed between the front end of said-rod and a part of the barrel carrier, a trigger mechanism .cooperating with a part carried by said rod,

and a helical spring encircling said rodI and exerting forward pressure on the breech block.

13. In a machine gun', a main casing, a barrel carrier slidably guided therein, a breech bolt and firing pin slidably mounted in saidcarrier, a breech block also slidably mounted in said carrier, afhammer articulated to said carrier, a slidable rod guided in the casing and extending through an lopening inthe breech block, the forward end of said rod having an actuating connection with said hammer, said rod having by said carrier, a breech block slidably car- 10 a tubular front end, a second rod connected ried in said carrier, a hammerarticulated to to a part on the carrier and slida-bly engagsaid carrier, an automa-tic lock for holding 'ing said recess, a compression spring ensaid hammer, and means on the breech block 5 circling said second rod, and trigger mechafor automatically unlocking said hammer.

nism coacting with said rst named rod. In testimony whereof, I' aIiX my signa- 15 14. In a machine n, a main casing, a ture. barrel carrier slidab y guided therein, a breech boltl and firing pin slidably carried NCASIO CEDILLO. 

